ARM: KVM: VGIC interrupt injection
Plug the interrupt injection code. Interrupts can now be generated
from user space.
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index c327fd9..3c8d6a9 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -810,20 +810,49 @@
trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level);
- if (irq_type != KVM_ARM_IRQ_TYPE_CPU)
- return -EINVAL;
+ switch (irq_type) {
+ case KVM_ARM_IRQ_TYPE_CPU:
+ if (irqchip_in_kernel(kvm))
+ return -ENXIO;
- if (vcpu_idx >= nrcpus)
- return -EINVAL;
+ if (vcpu_idx >= nrcpus)
+ return -EINVAL;
- vcpu = kvm_get_vcpu(kvm, vcpu_idx);
- if (!vcpu)
- return -EINVAL;
+ vcpu = kvm_get_vcpu(kvm, vcpu_idx);
+ if (!vcpu)
+ return -EINVAL;
- if (irq_num > KVM_ARM_IRQ_CPU_FIQ)
- return -EINVAL;
+ if (irq_num > KVM_ARM_IRQ_CPU_FIQ)
+ return -EINVAL;
- return vcpu_interrupt_line(vcpu, irq_num, level);
+ return vcpu_interrupt_line(vcpu, irq_num, level);
+ case KVM_ARM_IRQ_TYPE_PPI:
+ if (!irqchip_in_kernel(kvm))
+ return -ENXIO;
+
+ if (vcpu_idx >= nrcpus)
+ return -EINVAL;
+
+ vcpu = kvm_get_vcpu(kvm, vcpu_idx);
+ if (!vcpu)
+ return -EINVAL;
+
+ if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS)
+ return -EINVAL;
+
+ return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level);
+ case KVM_ARM_IRQ_TYPE_SPI:
+ if (!irqchip_in_kernel(kvm))
+ return -ENXIO;
+
+ if (irq_num < VGIC_NR_PRIVATE_IRQS ||
+ irq_num > KVM_ARM_IRQ_GIC_MAX)
+ return -EINVAL;
+
+ return kvm_vgic_inject_irq(kvm, 0, irq_num, level);
+ }
+
+ return -EINVAL;
}
long kvm_arch_vcpu_ioctl(struct file *filp,
@@ -904,6 +933,12 @@
void __user *argp = (void __user *)arg;
switch (ioctl) {
+ case KVM_CREATE_IRQCHIP: {
+ if (vgic_present)
+ return kvm_vgic_create(kvm);
+ else
+ return -ENXIO;
+ }
case KVM_ARM_SET_DEVICE_ADDR: {
struct kvm_arm_device_addr dev_addr;